Blackboard-eraser.



W. E. & F. B. BAYLESS.

BLAGKBOARD ERASER. APPLICATION FILED APR.28, 1915'.

Patented Jan. 30, 1917.

I 5 w 74% W wumaooeo WILLIAM E. BAYLESS AND FRANK B. BAYLESS, OF MUNCIE, INDIANA.

BLACKBOARD-ERASER.

Application filed April 28, 1915.

To all whom it may concern:

Be it known that we, WILLIAM E. BAY LESS and FRANK B. BAYLESS, citizens of the United States, residing at Muncie, in the county of Delaware and State of Indiana, have invented new and useful Improvements in Blackboard-Erasers, of which the following is a specification.

This invention relates to blackboard erasers of that class in which strips of felt or similar resilient fibrous material are glued or cemented on a backing block to provide a device which by rubbing the same over the face of a blackboard will absorb the chalk dust from the same to provide a clean rubbing surface.

The invention has for its object to provide a device of this class which will be simple in construction and which will be well adapted to absorb and retain the dust.

A further object of the invention is to produce an eraser of the class described having a back with which the erasing strips may be effectively united by means of glue or cement and which, when desired, may also be utilized to provide a polishing face.

lVith these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claim.

In the accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claim may be resorted to when desired.

In the drawing, Figure 1 is a bottom plan View of an eraser constructed in accordance with the invention. Fig. 2 is an end View of the same. Fig. 3 is a transverse sectional view taken on the line 3-3 in Fig. 1, through the stitched portion of the device. Fig. 4 is a perspective view showing the two felt strips used in constructing the device, one of said strips having its sides socured together by stitching. Fig. 5 is a Specification of Letters Patent.

Patented Jan. 36, 1%13.

Serial No. 24,550.

perspective view illustrating the manner of assembling the strips together for stitching.

Corresponding parts in the several figures are denoted by like characters of reference.

The improved eraser is formed of a back member A and two strips B, G of felt or other suitable resilient fibrous material. The strips B and C are exactly of equal width, but the strip B is of a length materially exceeding that of the strip C.

In the manufacture of the device the strip B is doubled upon itself with its ends juxtaposed, and the two side portions of the strip are then stitched together intermediate their ends, as shown at 15. The strip C is now doubled upon the ends of the strip B, said strip 0 being of such length that the ends thereof will be juxtaposed to the stitched portion. The ends 16 of the strip B, together with the entire strip C, are now folded within the loop 17 formed by the stitched portion 15, said looped portion being turned or reversed, as clearly seen in Fig. 5, thereby positioning the entire strip C between the loop 17 and the ends 16 of the strip B, the latter being made of such dimensions that the strip C, together with the ends 16, will fit snugly within the loop 17. The eraser body having thus been formed is fastened by means of glue or cement 18 on the back member A which is formed of a piece of felt which has been previously compressed to reduce the thickness thereof and to proportionately increase the stiffness thereof, thus forming a simple, light, durable and eifective erasing device.

Having thus described the invention, what is claimed as new, is 1- An eraser body comprising a strip of erasing material folded upon itself and having its side portions stitched together at a point spaced from the ends thereof, said ends being folded within the loop thus formed, and a filler inserted between the ends of the loop portion of the strip.

In testimony whereof we affix our signatures in presence of two witnesses.

WILLIAM E. BAYLESS. FRANK B. BAYLESS. Witnesses CHARLES A. McGoNAcLn, EDITH M. SCHAEFER.

@opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 6. 

